OPTIMIZE TABLE.


sql/ha_innodb.cc:
  Fix for BUG#11704: "Found locks from different thread" warnings:
  The source of warnings was this scenario in OPTIMIZE:
    thr1: lock table with TL_WRITE_ONLY (InnoDB converts lock to TL_WRITE_ALLOW_WRITE)
    thr2: (UPDATE command) obtains a TL_WRITE_ALLOW_WRITE lock
    thr1: call mysql_lock_abort(). This function sets type of thr'1 lock to TL_WRITE_ONLY
    thr2: try to release thr2's lock. See two locks: TL_WRITE_ONLY, TL_WRITE_ALLOW_WRITE 
          and produce a warning.
  
  The fix: Make InnoDB not to convert TL_WRITE_ONLY locks to TL_WRITE_ALLOW_WRITE in
  OPTIMIZE TABLE.